Mainstream class group data is shown separately from standard/year-group enrolment data. The source does not identify which standard/year group each class group belongs to.
Average class size
22.58
2025/26
Mainstream classes
19
2025/26
Largest class group
28
2025/26
Classes with 30+ pupils
0
2025/26
Class group metrics trend
Class group metrics by year
Year
Mainstream class pupils
Mainstream classes
Average class size
Largest class
Classes 30+
2006/07
469
17
27.59
33
7
2007/08
457
17
26.88
32
5
2008/09
455
17
26.76
32
4
2009/10
449
17
26.41
31
2
2010/11
452
17
26.59
30
1
2011/12
440
17
25.88
30
1
2012/13
443
17
26.06
30
1
2013/14
455
17
26.76
31
3
2014/15
446
17
26.24
31
2
2015/16
444
17
26.12
30
1
2016/17
451
17
26.53
29
0
2017/18
450
18
25.00
29
0
2019/20
440
19
23.16
29
0
2020/21
442
19
23.26
29
0
2021/22
440
19
23.16
29
0
2022/23
436
19
22.95
29
0
2023/24
430
19
22.63
28
0
2024/25
440
19
23.16
28
0
2025/26
429
19
22.58
28
0
Data highlights
Key numbers to spot outliers or notable changes.
Biggest gain in a single year: 1993/94: 119 in 1982/83 → 282, +163 pupils.
Biggest loss in a single year: 2019/20: 490 in 2018/19 → 477, -13 pupils.
Largest single-class increase: Junior Infants in 2023/24 (42 → 56, +14).
Largest single-class decrease: Junior Infants in 2022/23 (57 → 42, -15).
Largest cohort-step gain: 1st → 2nd in 2025/26 (49 → 58, +9).
Largest cohort-step loss: 1st → 2nd in 2023/24 (55 → 51, -4).
Overall: 67 (1974/75) → 467 (2025/26), 400.
Summary statistics (class-level data)
Min / max / mean enrolment per class across the available final by-standard years.
Class
Min
Max
Mean
Years
Junior Infants
42
60
53.2
6
Senior Infants
44
60
54.0
6
1st Class
49
61
55.2
6
2nd Class
51
64
55.7
6
3rd Class
54
64
56.3
6
4th Class
52
61
56.0
6
5th Class
53
64
57.0
6
6th Class
51
58
55.2
6
Total
64
490
376.1
42
Total enrolment over time
Total and gender trends use historical records where available. Class-level data starts in 2020/21.
Enrolment by gender over time
Enrolment by class over time
Cohort progression
Track how each cohort (pupils who were in the same class in the same year) progresses through the school. Each step shows the count; the number between steps is the net change (pupils gained minus pupils lost).